28158672 has 40 divisors (see below), whose sum is σ = 72941760. Its totient is φ = 9360640.

The previous prime is 28158661. The next prime is 28158673. The reversal of 28158672 is 27685182.

It is a self number, because there is not a number n which added to its sum of digits gives 28158672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28158673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26797 + ... + 27827.

It is an arithmetic number, because the mean of its divisors is an integer number (1823544).

Almost surely, 2^28158672 is an apocalyptic number.

It is an amenable number.

28158672 is an abundant number, since it is smaller than the sum of its proper divisors (44783088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28158672 is a wasteful number, since it uses less digits than its factorization.

28158672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611 (or 1605 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 28158672 is about 5306.4745358854. The cubic root of 28158672 is about 304.2314142849.

The spelling of 28158672 in words is "twenty-eight million, one hundred fifty-eight thousand, six hundred seventy-two".